From f04b33636d7779fc4d9227e3674c1939ad012595 Mon Sep 17 00:00:00 2001
From: Germain Italic <17506424+germain-italic@users.noreply.github.com>
Date: Sat, 25 Nov 2023 23:02:49 +0400
Subject: [PATCH] Feature/import schema (#70)

* remove empty trailing spaces

* add a button to create schema on the relations page, aligned with flex

* import an sql schema from copy/pasting

* option to disable foreign key checks and drop existing tables

* read a list of .sql files to import as a schema

* wording
---
 .gitignore         |   4 +-
 core/relations.php |   4 +-
 core/schema.php    | 140 +++++++++++++++++++++++++++++++++++++++++++++
 schema/.gitkeep    |   0
 4 files changed, 146 insertions(+), 2 deletions(-)
 create mode 100644 core/schema.php
 create mode 100644 schema/.gitkeep

diff --git a/.gitignore b/.gitignore
index 6bd94b5..746b147 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1 +1,3 @@
-core/app/
\ No newline at end of file
+core/app/
+schema/*
+!schema/.gitkeep
\ No newline at end of file
diff --git a/core/relations.php b/core/relations.php
index e349794..29b1c2d 100644
--- a/core/relations.php
+++ b/core/relations.php
@@ -246,7 +246,9 @@
 <hr>
 On this page you can add new or delete existing table relations i.e. foreign keys. Having foreign keys will result in Cruddiy forms with cascading deletes/updates and dropdown fields populated by foreign keys. If it is not clear what you want or need to do here, it is SAFER to skip this step and move to the next step! You can always come back later and regenerate new forms.
 <hr>
-<form method="post" action="tables.php">
+
+<form method="post" action="tables.php" class="d-flex justify-content-between">
+    <a href="schema.php" class="btn btn-secondary">Import Schema or Dump</a>
     <button type="submit" id="singlebutton" name="singlebutton" class="btn btn-success">Continue CRUD Creation Process</button>
 </form>
 </section>
diff --git a/core/schema.php b/core/schema.php
new file mode 100644
index 0000000..0a4c66e
--- /dev/null
+++ b/core/schema.php
@@ -0,0 +1,140 @@
+<?php
+include "app/config.php";
+
+$errors = [];
+$schemaFiles = glob('../schema/*.sql');
+
+
+
+function extractTableNames($schema) {
+    $pattern = '/CREATE TABLE `?(\w+)`?/i';
+    preg_match_all($pattern, $schema, $matches);
+    return $matches[1] ?? [];
+}
+
+
+
+if(isset($_POST['submit'])){
+    $schemaFile = $_POST['schemaFile'] ?? '';
+    $schema = $schemaFile ? file_get_contents($schemaFile) : ($_POST['schema'] ?? '');
+
+    $deleteExisting = isset($_POST['deleteExisting']) ? true : false;
+
+    // Turn off default exception throwing
+    mysqli_report(MYSQLI_REPORT_OFF);
+
+    try {
+        // Delete existing tables from schema if checkbox is checked
+        if ($deleteExisting) {
+            $tablesToDelete = extractTableNames($schema);
+
+            mysqli_query($link, "SET FOREIGN_KEY_CHECKS=0;");
+            foreach ($tablesToDelete as $tableName) {
+                $dropTableSql = "DROP TABLE IF EXISTS `$tableName`;";
+                echo $dropTableSql;
+                mysqli_query($link, $dropTableSql);
+                if (!mysqli_query($link, $dropTableSql)) {
+                    $errors['schema'][] = "Something went wrong. Error description: " . mysqli_error($link);
+                }
+            }
+            mysqli_query($link, "SET FOREIGN_KEY_CHECKS=1;");
+        }
+
+        // Import new schema
+        if (mysqli_multi_query($link, $schema)) {
+            do {
+                // Store and then free the result set if there is one
+                if ($result = mysqli_store_result($link)) {
+                    mysqli_free_result($result);
+                }
+            } while (mysqli_more_results($link) && mysqli_next_result($link));
+        }
+    } catch (mysqli_sql_exception $e) {
+        // Catch and store the error
+        $errors['schema'][] = $e->getMessage();
+    }
+
+    // Check for any errors that occurred after the last executed query
+    if ($error = mysqli_error($link)) {
+        $errors['schema'][] = $error;
+    }
+
+    mysqli_close($link);
+
+    if (!isset($errors['schema'])) {
+        header('location:relations.php');
+        exit();
+    }
+}
+?>
+<!doctype html>
+<html lang="en">
+<head>
+    <meta charset="UTF-8">
+    <title>CRUD generator</title>
+    <link rel="stylesheet" href="https://stackpath.bootstrapcdn.com/bootstrap/4.5.0/css/bootstrap.min.css" integrity="sha384-9aIt2nRpC12Uk9gS9baDl411NQApFmC26EwAOH8WgZl5MYYxFfc+NcPb1dKGj7Sk" crossorigin="anonymous">
+
+</head>
+<body class="bg-light">
+<section class="pt-5">
+    <div class="container bg-white shadow py-5">
+        <div class="row">
+            <div class="col-md-12 mx-auto">
+                <div class="text-center">
+                    <h4>Import schema</h4>
+
+                    <?php if (isset($errors['schema'])) : ?>
+                        <?php foreach ($errors['schema'] as $error) : ?>
+                            <div class="alert alert-danger my-3" role="alert">
+                                <?php echo $error ?>
+                            </div>
+                        <?php endforeach ?>
+                    <?php endif ?>
+
+
+                    <form method="post" action="<?php echo $_SERVER['PHP_SELF']; ?>">
+
+                        <!-- Dropdown for selecting a schema file -->
+                        <div class="form-group my-5">
+                            <label for="schemaFile">Select a <code>.sql</code> schema file:</label>
+                            <select class="form-control" name="schemaFile" id="schemaFile">
+                                <option value=""></option>
+                                <?php foreach ($schemaFiles as $file): ?>
+                                    <option value="<?php echo htmlspecialchars($file); ?>" <?php echo (isset($_POST['schemaFile']) && $_POST['schemaFile'] == $file) ? 'selected' : ''; ?>>
+                                        <?php echo htmlspecialchars(basename($file)); ?>
+                                    </option>
+                                <?php endforeach; ?>
+                            </select>
+                            <small id="schemaFile" class="form-text text-muted">
+                                Place your .sql files in the <code>schema/</code> folder in the project root.
+                            </small>
+                        </div>
+
+                        <!-- Textarea for manual schema copy/paste -->
+                        <div class="form-group my-5">
+                            <label for="schema">Or copy/paste schema here:</label>
+                            <textarea class="form-control" name="schema" id="schema" rows="3"><?php echo isset($_POST['schema']) ? htmlspecialchars($_POST['schema']) : '' ?></textarea>
+                        </div>
+
+                        <div class="form-check my-5">
+                            <input class="form-check-input" type="checkbox" value="1" id="deleteExisting" name="deleteExisting" <?php echo isset($_POST['deleteExisting']) ? 'checked="checked"' : '' ?>>
+                            <label class="form-check-label" for="deleteExisting">
+                                Disable foreign key checks and drop existing tables?
+                            </label>
+                        </div>
+                        <br>
+                        <button type="submit" class="btn btn-primary" name="submit">Import schema</button>
+                    </form>
+                </div>
+            </div>
+        </div>
+    </div>
+</section>
+<br>
+
+<script src="https://code.jquery.com/jquery-3.5.1.min.js" integrity="sha256-9/aliU8dGd2tb6OSsuzixeV4y/faTqgFtohetphbbj0=" crossorigin="anonymous"></script>
+<script src="https://cdn.jsdelivr.net/npm/popper.js@1.16.0/dist/umd/popper.min.js" integrity="sha384-Q6E9RHvbIyZFJoft+2mJbHaEWldlvI9IOYy5n3zV9zzTtmI3UksdQRVvoxMfooAo" crossorigin="anonymous"></script>
+<script src="https://stackpath.bootstrapcdn.com/bootstrap/4.5.0/js/bootstrap.min.js" integrity="sha384-OgVRvuATP1z7JjHLkuOU7Xw704+h835Lr+6QL9UvYjZE3Ipu6Tp75j7Bh/kR0JKI" crossorigin="anonymous"></script>
+
+</body>
+</html>
diff --git a/schema/.gitkeep b/schema/.gitkeep
new file mode 100644
index 0000000..e69de29